Machines and inventions.pptx
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There are two types of machines: simple machines which often have 1-2 parts like tools, and complex machines which have more than 2 parts like a washing machine or bicycle. Most machines use burned fuels like cars, buses and planes, while others use electricity, and some need human energy or can harness energy from the wind, sun and water with little pollution.
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Machines and inventions.pptx
- 2. A machine is an instrument that makes work easier.
- 3. There are two types of machines. SIMPLE MACHINES COMPLEX MACHINES
- 4. SIMPLE MACHINES Simple machines often have 1 or 2 parts. Some simple machines are called tools. pliers screwdriver bottle opener pencil sharpener 2 parts 1 part
- 5. COMPLEX MACHINES Complex machines have more than 2 parts. washing machine electric screwdriver watch bycicle more 2 parts
- 6. Most machines use burn fuels. car bus plane
- 7. Other machines use electricity. hairdryer electric drill
- 8. Some machines need energy from people to make them work. stapler scissors
- 9. Some machines use energy from the wind, sun and water. They produce little pollution. wind sun water